Rivet spinning machine



Patented Nov. 21, 1933 PATENT OFFICE RIVET SPINNING MACHINE v Philip X.Noel, Bridgeport, Conn, assignor to The Grant Manufacturing and Machine00., Bridgeport, Conn., a corporation of Connecticut ApplicationSeptember 23, 1931 7 Serial No. 564,600

5 Claims.

This invention relates'to new and useful improvements in rivet spinningmachinesand more especially the spinner type ofriveters adapted forheading relatively small rivets when applied to 5 and as used in theassembling of structural parts. An Object of the invention is to providea light form of rivet spinningmachine of this general type that isespecially adapted for close Work, such as spinning heads on rivetslocated between 10 parts of assembled structures, and where it isnecessary to position the spinning head within the structure beingassembled. The machine is especially adapted for spinning heads uponrivets used in fastening together parts oi'childrens toys,

members are riveted to the wood parts and metal runners. V

A further object of the invention is to provide in this type of machinevarious fine adjustments 20 not only of the supporting table, but tolimit the movement of the spinning head to and from the to be work so asto better adapt the machine used by inexperienced operators.

The machine further includes a novel means of supporting and assemblingthe operative parts of the machine whereby the same is .hingedly mountedso that the spinning head may be advanced to and returned from the workand whereby the power applied for rotating the spinning head is directlyover the hinged axis of the "supporting arm and including a drivingshaft that is at a right angle to said axis. i

. Further features of the invention'residejin the spinning head, itsrollers and means for lubricating the same, as will be later more fullydescribed.

With these and other objects in View, the invention resides andconsists-in the construction and novel combination and arrangement ofparts hereinafter more fully described, illustrated in 1' 40 theaccompanying drawing, and'pointed out in the claims hereto appended, itbeing understood that various changes in theform, proportion, size, andminor details of construction within the scope of the claims may beresorted to without departure from the spirit, or sacrificing any of theadvantages of the invention.

-Similar characters of reference denote like or corresponding partsthroughout the several figuresof the accompanying drawing forming a partof this specification and upon which Fig. 1 shows a vertical sectionalelevational view of my improved type of rivet spinner;

Fig; 2 shows an enlarged detailed vertical cross 5 sectional view of thespinning head, its driving such as sleds'and the like, wherein the bracegear, and portion of the supporting arm in which it is journaled; l

Fig. 3 is a further enlarged and similar vertical cross sectional vviewthrough. the lower end portion of the spinning head, includingitsrollers, better to illustrate the means for oiling the roller bearings;and N Fig. 4 shows a somewhat similar vertical cross sectional view of aslightly modified form of spinning head. 7 V

Referring in detail to the characters of reference marked upon thedrawing, 10 represents a pedestal adapted tobe supported on a floor andto carry all the parts of the machine. This pedestal is preferablyhollow havinga longitudinal verti-g 70ft. cal front opening 11 and asomewhat similarv longitudinal opening 12 in the rear side. Its top orbed end 13 is closed and relatively heavy, better to support theswinging arm 14 again to be referred to. y 1 i The parallel edges of thefront opening 11 are finished to form vertical ways 11. to receivecorresponding vertical ways of-the work table 15 that is adapted to beadjusted vertically on the pedestal and secured in said adjustment bymeans of a clamping screw 16 that engages a nut 17 positioned within thepedestal and against the inside of the two vertical edges of theopening.

A convenient means of adjusting this table upon ,the pedestal isprovided upon the front side immediately beneath the table and isadapted -to be'operated when the clamping screw 16 is slightly loosened.This adjustingmeans comprises a yoke 18 that is fittedagainst the faceof the two vertical ways of the pedestal and is provided with a centralhole to accommodate a clampingscrew' 19 that extends .therethrough andengages a nut ;20, similar to the nut 17 be fore mentioned, and whichlike the last men'- tioned nut engages the inner vertical edge portionsof the pedestal adjacent the front-opening. An adjusting screw 21 isseated in the yoke 18 and is provided with a lock nut 22.- The head ofthisadjusting screw is seated against the under edge portion-of thetable so that with turning of the screw in one direction the tablecan beraised when the screw 16 is-loosened, whereas with the turning of thescrew in theopDOsite direction: the weight of the table will descend asby gravity, and when adjusted to the desired 105 position issecured bythe clamping of the lock nut and the tightening of the screw 16.

The horizontal surface portion of the table-is provided with a hole 23to receive .amandrel 24 Which may varyin form according. to the 110particular type of work to be supported thereon. This mandrel includes alarger head portion adapted to be seated on the table and a cylindricalshank portion of a smaller diameter adapted to fit in the hole 23 of thetable. This shank portion is provided with a central longitudinal tappedhole to receive a clamping screw 25 that is positioned therein from theunderside after first having passed through a washer 26 that engages theunderface of the table, and whereby upon the turning of the screw themandrel is tightly clamped to the table in position to support the workfor operations thereon.

To the top or table end of the pedestal, I secure by means of bolts 27 apair of aligned bearings 28-28. These bearings serve to support thetrunnions 29 of the swinging arm 14, forming a pivotal support, wherebythe arm is adapted to be swung for the purpose of raising and loweringits spinning head with relation to the work. upon which it is tooperate. This swinging arm is of a special construction and includes adepending curved end portion 30 that ivotally connects through the rearopening of the pedestal with the longer one 31 of two toggle members,the other member 32 of said toggle being hingedly connected to a fixedpin 33 that is secured. in the opposite side portion of the pedestal. Apin 34 connects the two toggle members with a shackle 35 carried on theupper end of the vertical connecting rod 36. The first mentioned togglemember 31 includes an extended end portion 37 which is positioned andproportioned so as to engage a sleeve 38 upon the pivotal pin 33 whenthe mechanism is operated through the connecting rod 36 to draw down thepivotally connected ends of the two toggle members in a way to lift thecurved end 30 of the arm and lower its head portion, and thus limit thedownward movement of said head. The amount of this movement may bereadily adjusted by the turning of the link 36 with relation to theshackles and the clamping of the nuts 39 thereon.

'An adjustable stop 40 including a lock nut 41 is positioned in the topof the pedestal in alignment with a boss 42 on the underside of the arm,which is adapted to strike the head of the screw and arrest the downwardmovement of the curved end of the arm 14 and the upward movement of thehead end. The arm isadapted to be swung on its pivot through a footlever 43 hingedly supportedupon a pin 44 secured to opposite sides ofthe pedestal, said lever being operatable against the action of a spring45, one

end of which is attached to the foot lever as at 46, and the other to apin 47 secured to the pedestal. A shackle 48 attached to the lever 36 ispivotally connected to the foot lever so that with the operation of thefoot lever by the spring or against the action thereof, the link willimpart movement to the toggle which in turn rocks the swinging leverwith relation to the pedestal and its table. 7 c

The driving shaft 49 for the spinning head 50 is positioned above theaxis upon which the arm is hinged to swing and at a right angle with respect'to said axis. This shaft is journaled in aligned bearings 51 ofthe swinging arm and is provided with a belt pulley 52 positioned immediately above the axis of the trunnions so that the pull of an attachedbelt, when connected to an overhead driving pulley, will be upward andin alignment with the axis of the trunnion so as to not materiallyinterfere with the swinging operation of said hinged arm. Upon theforward end of this driving shaft is mounted a bevelled gear 53 thatmeshes with and drives a somewhat similar bevelled gear 54 secured tothe spindle 55 of the spinning head.

The spindle 55 is mounted vertically in the short or head end of theswinging arm and at a right angle to the before mentioned driving shaft,and as shown in the drawing the bevelled gears employed to drive thespindle from the driving shaft may be enclosed with a suitable sheetmetal covering 56, as shown in Fig. 1. The spindle is mounted in ababbitted bearing 57 of the arm and is provided with an. annular rollerthrust bearing 58 positioned between the underside of the arm and anannular shoulder 59 of the head.

The head includes a pair of rollers 60 having suitable. annular surfacesto insure the formation of the desired form of rivet head. These rollersare positioned in separate slots or pockets 61 that are formedlongitudinally of and at an acute angle to the axis of the head so thatthe inner edges, 62 of the exposed portion of the rollers will engageand run together at the underside of the head to form a combined closedoperatTng surface, whereas the inner or upper edges will be positionedin spaced relation to each other. These rollers are mounted to turn on abearing 63 which may be a pin or screw, as shown in the drawing, with ahead upon one end, positioned in a pocket 64 of the head 50 and athreaded end to engage the tapped hole 65 of the spinning head. Atapered hole 66 is provided in each roller to receive the pivotal screwso that the inner lower wall of this hole will at all times bear flushwith the underside of the bearing screw, thus allowing a firm engagementofthe screw with the rollers in a way to insure a firm operative supportof the rollers within the head.

Means for oiling the head and more especially the rollers is alsoprovided and includes a central reservoir 67 which has one or. moreintersecting radial holes 68 that communicate with an annular pocket 69which in turn is supplied with a suitable lubricant through the intakehole '70 formed in the head end of the arm, and having a lubricantintake '71. A small passage extends down from the reservoir between theupper portion of the rollers so as'to feed the lubricant thereto. Thispassage 72 may be in the form of asmall inserted pipe, as shown in Figs.2 and 4, or may be formed in the web of the head which extends betweenthe two rollers, as shown in Fig. 3. It is important that this lubricantpassage extend clear through to the bearing asotherwise the oil will bethrown out of the pockets on to the work by centrifugal force.

. In the modification shown in Fig. 4, the head 50% is threadablyattached to the spindle'52 and also includes a reservoir to whichlubricant is I supplied through the intake '71 so that the lubricant maybe fed down through the passage '72 to the bearings, as in the otherform.

In Fig. l I have shown, in dotted lines, a part of a sled wherein "a andfb represent wood portions of the sled frame, 0 an iron bracket, and dan iron runner. This is a class of work which the machine is especiallyadapted to do, as will be seen, the work being positioned under therunner d to operate upon the head end of the rivet e whereby the bracket'0 is secured to the wood frame members a and b. It has not beenpractical heretofore to do this class of close work upon any commercialform of machines for the reasonthat the spindles of all such machineswere longer, and the general design of the machine so difierent that itwas not v V possible to get the riveting head of these mai-chines inbetween the fixed distances of the spinning head including a fixedbearing, spaced apart rollers mounted on the bearing, the said headbeing provided with an oil reservoir above the roller, and a centrallubricant passage extending from the said reservoir down between therollers to the bearing.

2. In a machine of the class described, a spinning head including a pairof rollers disposed longitudinally of and at acute angles with relationto the axis of the head, and provided with an oil reservoir, an oilpassage connected with the reservoir, a pipe extending from the saidpassage down between the rollers to the bearing.

3. In a rivet spinning machine, the combination with a pedestal, of acurved arm hingedly mounted thereon, a driving shaft journaled in saidarm above and at a right angle to its pivotal axis, a spindle mounted inthe arm at a right angle to said driving shaft, gears connecting thedrivingshaft and spindle for operating the latter, the said spindleincluding a spinning head having a roller adapted to form a rivet head,and

foot power means and toggle connection with the swinging lever to movethe spinning head to and from operative positions. 7

4. In a machine of the class described, an arm, a spinning headincluding a spindle mounted in the arm, means for operating the spindleand head, the said spindle having a peripheral annular groove, areservoir and oil passages extending from the groove to the reservoir, abearing secured in the spinning head, spaced-apart rollers mounted onthe bearing, a central lubricant passage extending from the reservoirdown between the and apart from the rollers to the bearing.

, 5. A rivet spinning machine comprising a pedestal, a work tablemounted on the pedestal, a curved arm hingedly mounted in the pedestaland having a depending end portion, a toggle connecting said end portionand pedestal, a lever and link connection for operating the toggle,means for limiting the movement of the toggle and arm in one direction,a driving shaft journaled in the arm above and at a right angle to itspivotal axis, a spindle journaled in said arm and carrying a spinninghead, gears connecting the driving shaft and spindle for operating thelatter,

a pulley mounted on the driving shaft immediately above the pivotal axisof the lever so that the pull of the driving belt will be in directalignment with the said axis.

PHILIP X. NOEL.

